Update main.yml

.github/workflows/main.yml

@@ -10,11 +10,19 @@ on:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
-   build:
+  build:
+
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x]
+
     steps:
     - uses: actions/checkout@v2
-    - name: Install modules
-      run: yarn
-    - name: Run tests
-      run: yarn test
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: yarn install
+    - run: yarn test